CENTOS6.8 firewall settings

1, the basic operation

# 查看防火墙状态
service iptables status

# 停止防火墙
service iptables stop

# 启动防火墙
service iptables start

# 重启防火墙
service iptables restart

# 永久关闭防火墙
chkconfig iptables off

# 永久关闭后重启
chkconfig iptables on

　　

2, view the status of the firewall, the firewall is turned on and the only open port 22

3, open port 80

Vim / etc / sysconfig / iptables 
# adding the following code, than the two painted gourd dipper :) 
-A State --state the INPUT NEW -m -m -p TCP TCP 80 --dport -j ACCEPT

Save and exit reboot the firewall

service iptables restart

=================== dividing line ===================

Other open other ports is also true.